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J. W. PERTZ. POWER MECHANISM FOR AGTUATING STEAM HAMMERS, m. v No.325,860. a Patented Sept. 8, 1885.

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(No Model.)

J. W. PERTZ. POWER MECHANISM FOR LAGTUATINGMSTEAM HAMMBRS, m;

Patented Sept; 8, 1885.

lllllllll N. PEIERs PhawLnho n her. Washington. 0.).

1 UNITED STATES PATENT JOHN WILHELM PERTZ, OFPITTSBURG, PENNSYLVANIA,ASSIGNOROF ONE- HALF TO GEORGE E. WILLIAMS, OF SAME PLACE.

POWER MECHANISM FOR ACTU ATING STEAM-HAMMERS, 80C.

SPECIFICATiON forming part of Letters Patent no. 325,860, datedSeptember 8, 1885.

A Application filed Septembe. 24, 1834; (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN WILHELM PERTZ, acitizen of the United States,residing at Pittsburg, in the county. of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in PowerMechanism for Actuatiug' Steam Hammers, Ore Stamps, Meat-Choppers, andlike Tools; and I hereby declare the following to be a full,'clear, andexact description of the same.

My invention is hereinafter illustrated and described as applied tosteammeat-choppers. It is, however, applicable not only to the class ofapparatus named, but to ore-stamps,steamhammers, and, indeed, all formsof mechanism wherein the reciprocation of a piston-rod and a quickcushioned blow are the objects to be attained.

The main. elements of the apparatus are a steam-cylinder, an aircylinderplaced in line with the steam-cylinder, an extended piston rod common tothe pistons of both cylinders, a

Valve-chamber communicating with the steamcylinder, steam-supply pipe,and an exhaustpipe controlled by a valve, and an ejector or equivalentpositive exhaust. In connection with these devices are used, in thepresentinstance, a suitable chopping-block or other form of anviladapted to the character of the machine, and a chopper, for which may besubstituted a die or hammer at the lower end of the piston-rod,according to circumstances. These main features and other details ofconstruction which form the complete, machine are illustrated'in theaccompanying drawings, in which Figure 1 is a vertical section of themachine with the chopping-block. Fig. 2is a sectional view showing amodified form of mechanism for actuating the valve and chopping-block.Fig. 3 is a side elevation of the same. Fig. 4: is a horizontal sectionof the valve and valvechamber shown in Fig. 1.

A represents the steamcylinder of the apparatus, having a single port,a, both for inlet and exhaust, and a relief-port, b.

B is an air-cylinder mounted above and in line with the cylinder A, andhaving. avalve, c, which prevents the formation of a vacuum in theair-cylinder.

D is the piston-rod which passes through the steam-cylinder and into theair-cylinder. Up

on it are mounted the steampiston E and the air-piston F. Thepiston-rod. is'of course chamber G, being guided by abutments g g,

and is a hollow valve, preferably a cylinder, having an open bottom, andexhaust-ports hh at its upper end The-abutment 9, near the port a, iscontinuous, so that when the valve H is in the position shown in thedrawings the steam entering the valve-chamber-G is cutoff from cylinderA; but the guideabutments g are interrupted so that the steam can passdirectly to exhaust-pipe f. The cylinder A is at this time incommunication with the exhaustpipe f through the center of hollow valveH, and as the live steam from e flows around the valve H 011 its way tothe exhaust-pipe f it will operate as a positive or suction exhaust, 011the ejector principle,to draw the steam from cylinder A. The valve-stemi is connected to the valve and passes through the end 'of thevalve-chamber,below which it is connected to the controlling-lever I.

To the lower end of the piston-rod is secured the tool K, which in thedrawings is a chopping-knife, but which may, as before stated, he ahammer, die, or other device.

Pivoted belowthe cutting-knife is a rotating chopping-block, L, mountedupon suitable supports. As shown in Fig. 1, it is caused to revolve'intermittently by means of a worm, is, which gears into a rack upon therotating block. The worm is actuated by a rod,l, which is connected tothe controlling-lever I.

When the valve H is raised from. the position shown in the drawings soas to open communication between steam-supply pipe e and port a, theupper end of the valve H will either close the exhaust-pipe f, as shownin Fig. 1, or cut off the communication between the chamber G andeXhaust-pipef, as shown in Fig. 2, so that the live steam from pipe 6will flow directly to cylinder Athrough port a.

A continuous supply of boiler-steam enters the valve-chamber, which,when the lever is raised and the exhaust closed, passes into thesteam-cylinder below the piston. The latter is thereby forced up, whileat the same time the air-piston compresses the air in the upper part ofthe cylinder B. YVhen the lever is depressed, the expansion of thecompressed air forces down the piston rod and choppingknives. Thedescent of the piston-rod is also accelerated by the exhaust through theport a and into and through the interior of the valve and out throughits ports to the exhaust-pipes. This exhaust results from descent ofvalve H into the position shown in the drawings, as this uncloses theexhaust-pipe f, and while it cuts off the steam supply from the cylinderA puts it in communication with the exhaustf, so that the flow of livesteam passes theend of the valve H, and acts as an ejector to exhaustthe steam from cylinder A through the center of valve H.

I have shown in Fig. 2 a modified' form of mechanism for operating thechopping-block and steam and exhaust valve. A shaft, M, is journaled ina horizontal beam, N, forming a port-ion of the frame of the machine,Fig. 3. Upon the inner end of this shaft is keyed a disk, 0. This diskis connected by a wristpin, 0,with a block, 0, sliding in a crosshead,P, secured to the piston-rod. Upon the shaft M is an adjustable cam, Q,connected to the stem of the exhaust-valve by a suitable yoke. Ahand-wheel, R, and a band-wheel, S, are also mounted on the shaft nearthe outer end. The latter is connected by a belt with a pulley, T, theshaft t of which is journaled in the support for the chopping-block. Onthis shaftt is a pinion, t, which gears into a circular rack, t, on thelower edge of the chopping-block. The movement of the piston andcross-head causes a rotation of the disk 0 and of the shaft M. The valveis thereby closed and opened at proper intervals, while thechopping-block receives rotary motion transmitted to it by' the belt andgearinng.

The main advantages of my invention are, first, that as the expansiveforce of the compressed air is supplemented by the exhaust a quick andeffective stroke is obtained; and, secondly, that the expansion of theair delivers a yielding blow and cushions against reaction, which isvaluable in orestamps, power-hammers, 850. There are minor advantages,due to the simplicity of construction, which will be apparent to allskilled mechanics. V

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

1. In a power-motor for actuating a tool, the combination of a steamcylinder and piston, an auxiliaryair cylinder and piston, said pistonsbeing coupled together, a valve for controlling the port of thesteam-cylinder, and an ejector, substantially as and for the purposesspecified.

2. The combination, with a steam-cylinder, of a valve-chamber having asteam supply and exhaust port, and a hollow valve which controls thesteam-port of the cylinder and is arranged with'relation to the steamsupply and exhaust ports to form an ejector, substantially as and forthe purposes specified.

3. The combination, with a steam-cylinder having a port, (6, of thevalvechamber having the steamsupply pipe 6 and exhaust-pipef, and thehollow cylindrical sliding valve H, having the ports h h, substantiallyas and for the purposes specified.

JOHN WILHELM PERTZ.

In presence of- W. M. GORMLY, CHAS. H. TAYLOR.

